I agree with
@AntiqueShopper that the best thing to do first is have the store transfer in the piece you’re comparing, if possible. When we were picking out my DBTY necklace, we compared a 0.21 G VS1, a 0.21 I VS1, and a 0.22 H VVS1. I couldn’t see much of a difference between the G and the H, but there was a noticeable difference in color and size between the I and the other two stones—the I looked smaller, even though it was the same carat weight as the G (all three were triple ex).
Let us know which one you decide to purchase! I wear mine daily.